f265745bc233fc1e38dd6b6898bd240e036da822
Reverts flutter/engine#42312 Original PR caused crash https://github.com/flutter/flutter/issues/130028 Will reopen https://github.com/flutter/flutter/issues/120555
Revert "[iOS][Keyboard] Wait vsync on UI thread and update viewport inset to avoid jitter." (flutter/engine#43422)
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